I purchased this mat for use on Berber carpet. I guess long gone are the days when one could buy a nice thick virtually indestructible chair mat for $50 or so and the last mat I had in that price range cracked up after only a few years under a 120 lb. user.Its size in nice and it obviously won't slide. My chair rolls fairly easily on the mat. Soon after receiving the mat though I realized that my chair casters had already made indentations. So I went looking some more and found chair casters that are slightly softer and wider than hard plastic casters on the recommendation of a Staples CSR who recommended these casters as a solution to prevent mat cracking. So I shelled out about another [$]for these new casters for a total of almost $160 for a mat and casters combined tax included. I hope to return later and revise this review after seeing how this mat performs with these casters which I hope will be more than adequate given the amount of money I've spent. The indentations that my old casters made may be permanent however even though I used the hard casters for only a very short period of time on the new mat.
If you position your chair in one place for too long it will make indentations in the chairmat which makes it difficult to move. It would be better to spend a little more and get one that is a little more rigid.